Title (de)

Title (fr)

Publication

Application

Priority

JP 27199398 A 19980925

Abstract (en)

A wavelength-tunable light emitting device includes a substrate having an atomic-scale structure formed on a surface thereof, a needle member for locally applying a voltage through a vacuum space or a transparent insulating member to the substrate to cause a tunnel current to flow through the atomic-scale structure, and a variable-voltage power supply capable of varying voltage applied across the gap between the substrate and the needle member. A tunnel current flows from the tip of the needle member to the atomic-scale structure when a predetermined voltage is applied across the gap between the substrate and the needle member, and light is emitted from a local region in which the tunnel current flows. The wavelength of the light varies when the voltage applied across the gap between the substrate and the needle member is varied. <IMAGE>